According to a report to be released this week from New York University’s Rudin Center for Transportation Policy and Management, the Port Authority doesn’t just need to rethink how to manage its business. It needs to rethink what that business is, according to the report’s author Mitchell Moss.

“Port Authority has allowed itself to be diverted to the pet projects of both New York and New Jersey, some of which have nothing to do with the core mission of the Port Authority, which is to operate and develop our bridges, our airports, our tunnels,” he told WCBS 880’s Alex Silverman.

NYU Report Finds Flawed Business Model At Port Authority Of New York And New Jersey

The agency spent more than $800 million from 2002 to 2012 on the so-called regional projects, which offer zero return to the Port Authority, the report found.

By far the biggest bleed is the PATH train system, which costs billions of dollars, Silverman reported. The agency lost $400 million on PATH in 2012, the report found.

“It continues to grow and it’s the only mass transit system which is not funded by any state tax revenue,” Moss told Silverman.

The report also found mismanagement, political abuse and rivalries between the states at the Port Authority.

“Stop investing in things which have no benefit for the region and would serve the narrow interest of each state, which the state should pay for, not the Port Authority,” said Moss. “This is draining money from the airports and from the people who drive across the bridges and tunnels.”

Moss said a good start is to change the two-headed power structure of the agency.